Gas-cock



(No Model.)

1). M. PARKER. GAS 000K.

No. 314,874. Patented Mar. 31, 1885.

WITN E9658:

ad Gmdzy,

UNITED STATES PATENT OFFICE.

DAVID M. PARKER, OF BOSTON, MASSACHUSETTS.

oAs-coo K.

SPECIFICATION forming part of Letters Patent No. 314,874, dated March 31, 1885.

'Application filed April 14, 1884. (No model.)

To all whom it may concern.-

Be it known that I, DAVID M. PARKER, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Gas Fixtures, of which the following is a specification.

The object of my invention is to provide a simple, cheap, convenient, efficient, and durable check for reducing the pressure and regulating the flow .of gas through the burner, so as to prevent undue pressure-at the point of combustion; and it consists in the construction, combination, and arrangement of a self-clearing check with the stop-cock of the fixture, so that the act of opening and closingthe same shall remove all sedimentor coal-tar from the check-passage which may be deposited while the gas is burning.

Figure 1 represents a side elevation of a gas-fixture having my invention applied thereto. Fig. 2 represents a horizontal longitudinal section of a gas-fixture constructed according to myinvention. Fig. 3 represents aside elevation of the stop-cock removed from the fixture, showing the gaspassage. Fig. 4rep-.

resents a similar view.

A represents a small gas-fixture provided with a burner, B, as heretofore in general use, having a stop-cock, E, of peculiar construction, being fitted within the tapering opening F gas-tight, as heretofore. Now, in order to check the flow of gas through the stopcock E when turned to the proper position to open the gas-passage, I construct the tapering body or stop with an orifice or cavity, L, of suitable depth and size to allow the gas to pass freely through the same to the small checkgroove P, and thence through the rightangle passage or opening R, extending toward the center of the plug or stop and uniting with the outlet-hole T, which communicates with the interior opening or tube supplying the burner 13.

This check-groove P, being formed smaller than any other portion of the gas-passage, regulates the flow of gas through the same and counteracts the excessive pressure by checking the flow at this point, so that only the desired amount can reach the tip of the burner to sustain perfect combustion when lighted and insure a clear, soft, steady light. The said check-groove P, being smaller than any other portion of the passage, the flow of gas through the same will cause the impurities contained in the-gas to be deposited in this groove, and if there were no means of removal would soon fill up the same to such an extent as to prevent a suitable quantity of gas passing to properly supply the burner, which objection I obviate by constructing a screw, N, or other inwardly-projecting device that will fit within the said groove P as it is turned past the projecting end of the screw N, which scrapes or removes the same therefrom into the openings or cavities L and T, located each side of or at each end of the said groove P, and which. are of such larger capacity as to receive and retain the impurities deposited without interfering with the free passage of the gas through the said cavities or openings to the burner B, as before described. It will be seen that the screw N is inserted into a suitably-formed hole made in the fixture to receive it, as shown in the drawings, and that the inward-projecting end of said screw E enters the said groove P when the said stop-cock is partially opened or partially closed, and when the stopcock is fully opened the point of the screw is within the opening or cavity R, and when the stop-cock is fully closed the point of the screw is within the cavity L.

Having thus described my invention, what I claim is A gas-fixture having a stop-cock, E, provided with a check-groove, P, and openings or cavities L and T, forming the gas-passage through the cock, and ascrew, N, adapted to pass through said groove when the stop-cock is turned,substant-ially as described, as and for the purposes set forth.

SYLvENUs WALKER, (inns. S. Goonrne. 

